CN103447528A

CN103447528A - Foldable changeable forming device for selective laser melting

Info

Publication number: CN103447528A
Application number: CN2013103206815A
Authority: CN
Inventors: 张安峰; 李涤尘; 侍行坤; 杨洪涛; 张海洋
Original assignee: XIAN RUITE RAPID MANUFACTURE ENGINEERING Co Ltd; Xian Jiaotong University
Current assignee: XIAN RUITE RAPID MANUFACTURE ENGINEERING Co Ltd; Xian Jiaotong University
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2013-12-18
Anticipated expiration: 2033-07-26
Also published as: CN103447528B

Abstract

The invention discloses a foldable changeable forming device for selective laser melting. The foldable changeable forming device is characterized by comprising a forming substrate, a base plate and a telescopic cover reduced from bottom to top gradually. The forming substrate is fixed on the base plate, the lower end of the telescopic cover is fixed to the periphery of the base plate, the base plate is connected with an upper plate of an electric push bar through a lower clamping part, and the upper end of the telescopic cover is connected with the lower surface of a forming face through an upper clamping part. After finishing the forming process, parts can be taken out and residual powder can be cleaned by only removing the foldable changeable forming device.

Description

The Foldable and easy be shaped for the laser selective melting is changed building mortion

Technical field

The present invention relates to 3D and print laser selective melting RP technique, particularly a kind of for metal and nonmetal laser selective melting building mortion.

Background technology

The laser selective melting a kind of RP technique that can the direct forming metal parts of (Selective Laser Melting, SLM) technology that is shaped is one of 3D principal mode of printing Quick-forming.The principle of this technology as shown in Figure 1.Industrial computer is controlled the scanning of galvanometer constituency according to the cad model information through slicing treatment, the fusion of metal powder be scanned bonds together, one deck has scanned, feeding cylinder rising one deck (formation cylinder descend accordingly one deck), scraper plate (or roller) are at forming face layer overlay powder, then carry out the scanning fusing of lower one deck, one deck connects one deck final part that is shaped like this.Because every layer of powder do not melted supporting the part part of inclination (even unsettled), therefore can directly produce the complicated metal parts that traditional diamond-making technique can't produce at all, and the part be shaped has good mechanical property, Just because of this, this technique is more and more extensive in the application of the aspects such as Aero-Space and biologic medical.

SLM technique is that scanning galvanometer is controlled laser beam scan path because of what adopt, speed can reach 3-5m/s, therefore its forming efficiency is higher, but part forming is complete, the cleaning of residual powder but will take a long time, because in forming process, more residual metal dusts that can be more or less on forming face, in formation cylinder, except the part be shaped, other spaces are unfused metal dust abrim all.These granularities only have the powder of tens micron sizes to want to clean out and be not easy, if adopt dust catcher to inhale, the powder that so not only time-consuming but also effort, and inspiration is gone, because be metal, is easy to the motor of dust catcher is damaged; And if the employing people uses the brush cleaning of clear powder by hand, can form dust during tiny powder moving, the grievous injury operating personnel's is healthy, is unfavorable for the long-term use of equipment, consume a large amount of non-cutting times, do not meet efficient, environmental protection, humanity concept on modern industry.The clearing and retrieving that how well to solve laser selective melting powder is also determining popularization and the industrial large-scale application of SLM apparatus and process on market in some sense.

At present, the EOSINT M280 of external SLM equipment picture Germany EOS, the FS-Realizer of Britain MCP company ^sLMmachine etc. all adopt special explosion-proof dust catcher to be recycled into the residual powder of shape, and this special dust catcher is at present domestic does not also have like product.

In actual production, if can there be better mode to be recycled into the shape powder, save this link of dust catcher, will certainly improve Whole Equipment efficiency, be more conducive to staff's health, thereby improve the competitive advantage of equipment, in the long run, also can better promote further developing and applying of laser selective melting technology.

Summary of the invention

In order to solve, existing SLM equipment Powder Recovery is consuming time, consumption power, the bad difficult problem of effect, the object of the present invention is to provide a kind of building mortion be shaped for the laser selective melting, this building mortion can stretch along with the lifting of electric pushrod, thereby reclaims more easily, removes residual powder.

In order to reach above purpose, the present invention takes following technical scheme to be achieved:

A kind of Foldable and easy be shaped for the laser selective melting is changed building mortion, it is characterized in that, comprise forming board, base plate, diminishing telescopic cover from the bottom up, forming board is fixed on base plate, the telescopic cover lower end is fixed on the base plate periphery, and base plate is connected with the electric pushrod upper plate by lower clamping element; The telescopic cover upper end is connected by the lower surface of upper clamping element and forming face.

In such scheme, described telescopic cover comprises a plurality of rings that are nested together, radially interior side loop upper end joint forming face lower surface; Outermost radial outside ring lower end is fixed on the base plate periphery, after each ring axial elongation, by contrary " L " periphery, connects.

The axial total height of described base plate and forming board is the total height under the state of compression higher than telescopic cover not.

With traditional method (the forming process powder is directly fallen in formation cylinder), compare, advantage of the present invention is:

1, in forming process, remaining powder all drops in the powder forming device of collapsible replacing, and along with the decline of base plate is stretched gradually, every paving layer of metal powder all can be fallen in telescopic cover.Be shaped after end, only needing this device is taken out can be by Powder Recovery, and it is quite convenient to operate

2, due to residual powder not on forming face, and every layer of remaining powder is all in telescopic cover, therefore after shaping finishes, do not need to adopt extra equipment to carry out remaining powder in cleaning equipment, save the cleaning operation process of artificial agitation, improved to a great extent staff's work situation.

3, greatly shorten the time of powder cleaning, Powder Recovery, improved the monolithic molding efficiency of equipment, improved the competitiveness of equipment on market.

The present invention is applicable to 3D and prints the Quick-forming field, and target is to solve the shaping Powder Recovery that exists on laser selective melting equipment, clear up an inconvenient difficult problem.Save the powder clearance time, improved the utilization rate of forming machine.

The accompanying drawing explanation

Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.

Fig. 1 is laser selective melting equipment principle schematic diagram.

Fig. 2 is the structural representation of apparatus of the present invention.In figure: 1. shaping basal plane, 2. compressing member, 3. cylinder body, 4. telescopic cover, 5. base plate, 6. compressing member, 7. forming board, 8. electric pushrod.

Fig. 3 is the schematic diagram of Fig. 2 building mortion compressive state.

Fig. 4 is the enlarged diagram of scalable cover coupling part.Wherein: a is I section enlarged drawing in Fig. 1; B is II section enlarged drawing in Fig. 2.

The specific embodiment

As shown in Figure 2, a kind of Foldable and easy be shaped for the laser selective melting is changed building mortion, is arranged in the cylinder body 3 of former formation cylinder, comprises forming board 7, base plate 5, diminishing telescopic cover 4 from the bottom up.Forming board 7 is fixed on base plate 5, and telescopic cover 4 lower ends are fixed on base plate 5 peripheries, and base plate 5 is connected with the upper plate of electric pushrod 8 by clamping element 6.Telescopic cover 4 upper ends are connected with former formation cylinder upper end with forming face 1(by clamping element 2) lower surface connected.

While starting to be shaped, electric pushrod 8 promotes base plate 5 and forming board 7 rises, make forming board concordant with forming face 1, now telescopic cover 4 also shortens thereupon, change in shape as shown in Figure 3, wherein telescopic cover 4 in the drawings shape only play the signal effect, material and structure are not limit in practical application, as long as can guarantee flexible effect and enough rigidity (when being unlikely to take out, caving in and cause powder to overflow) is arranged, the total height of base plate 5 and forming board 7 is the total height under the state of compression higher than telescopic cover 4 not.In forming process, building mortion is along with the decline of base plate is stretched gradually, and every paving layer of metal powder all can be fallen in this device.Be shaped after end, change in shape as shown in Figure 2, is

unclamped clamping device

2,6, takes out building mortion, cleans out metal dust wherein, takes out the part be shaped.

Fig. 4 has provided a concrete structure of telescopic cover 4, comprises the ring (Fig. 4 b) that a plurality of (at least three) that highly are greater than base plate and forming board total height are nested together, radially interior side loop upper end joint forming face 1 lower surface; Outermost radial outside ring lower end is fixed on base plate 5 peripheries, and each ring diameter increases successively, and after each ring axial elongation, by contrary " L " periphery connection, (Fig. 4 a).Under interior side loop, the inwall of " L " periphery " L " periphery on the ring of the outside slides, and can effectively prevent like this powder outflow.

Claims

1. the Foldable and easy be shaped for the laser selective melting is changed building mortion, it is characterized in that, comprise forming board, base plate, diminishing telescopic cover from the bottom up, forming board is fixed on base plate, the telescopic cover lower end is fixed on the base plate periphery, and base plate is connected with the electric pushrod upper plate by lower clamping element; The telescopic cover upper end is connected by the lower surface of upper clamping element and forming face.

2. the Foldable and easy for the laser selective melting as claimed in claim 1 is changed building mortion, it is characterized in that, described telescopic cover comprises a plurality of rings that are nested together, radially interior side loop upper end joint forming face lower surface; Outermost radial outside ring lower end is fixed on the base plate periphery, after each ring axial elongation, by contrary " L " periphery, connects.

3. the Foldable and easy for precinct laser fusion as claimed in claim 2 is changed building mortion, it is characterized in that, the axial total height of described base plate and forming board is the total height under the state of compression higher than telescopic cover not.